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  • Innovative Input Stage: Provides exceptional common mode rejection without introducing noise.
  • Precise Volume Control: Relay-switched, high precision resistors form an 80-step control, with a secondary path for click/pop-free adjustments.
  • Optional Phono-Preamplifier: Optimised for low noise and high common mode rejection, with adjustable gain and impedance.
  • High-Performance Output Stage: Class-A operation optimised for speed, precision, and high peak currents, capable of driving long cables.
  • Distributed Local Power Supply: Ensures minimal noise levels and efficient operation.
Soulution Audio 727 Preamplifier Specifications
Mains 220 – 240V (50 – 60 Hz)
100 – 120V (50 – 60 Hz)
Power Consumption < 1W standby
60W device in operation
Inputs 3 × balanced (XLR)
2 × unbalanced (RCA)
1 × Phono (optional)
Input Impedance 4.4MΩ balanced (XLR)
4.4MΩ unbalanced(RCA)
10 – 1000Ω or 47kΩ phono (adjustable)
Input Voltage Max. 9Vpp
Outputs 2 × balanced (XLR)
1 × unbalanced (RCA)
Output Impedance 0.8Ω balanced (XLR)
0.4Ω unbalanced (RCA)
Output Voltage Max 14Vpp balanced (XLR)
7Vpp unbalanced (RCA)
Output Current Max. 0.5A limited by protection circuit
Frequency Response (– 3 dB) DC - 20MHz
Phaseshift (@20kHz) < 0.2°
Signal-to-noise Ratio (20Hz – 20kHz @1Vrms) >120dB
Noise Density (input related) < -160dBV/sqrt(Hz)
THD+N <-120dB
Common Mode Rejection Ratio >105dB
Channel Separation >130dB
Gain +4dB balanced (XLR)
-2dB unbalanced (RCA)
+44dB to +84dB (phono)
Volume Control Range 0 to – 79 dB in 1 dB steps
Dimensions 480mm x 450mm x 167mm
Weight 28kg
  • 727 preamplifier
  • IR remote control
  • Mains cable
  • Spare fuses
  • User manual
  • Set of feet washers
  • Cotton gloves

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